He had it Coming
Sakura had Tobi just where she wanted him. Naruto had been fighting the man, but just a few moments ago had feinted from physical exhaustion. Sakura had arrived just in time and instead of landing a normal punch, she had loaded her chakra into a scalpel and cut the tendons in the back of his knees. A ninja with all of the self-restraint in the world wouldn't be able to hold in the scream of pure agony that resulted from this terrible attack.
Sakura always condemned the use of physical torture; but she would make an exception for this man. This is the same man that for years has been manipulating the Uchiha family, and now; after all he's done; he has the nerve to try to kill her best friend. Sakura had thought that she was training for the day she could bring Sasuke back; but now she had her own little revenge to carry out. This man had ruined countless lives; including hers; so now she would end his. If only she could decide how.
Her first thought was to skin him. She could peel his flesh away, layer by layer until her bled out or died from pain. She was fine with whichever happened first. She almost grinned when she imagined what the tearing of his flesh would sound like.
Her second option would be just as mentally torturous as it would be physically. She could rub at the edges of a kunai until the edges were dull. Then she would slowly saw off a finger, and then two, and then when he got the idea, she would gouge out his eyes before finally sawing his neck in half.
Her third choice would make him feel helpless when his body wouldn't function properly. She imagined herself slicing his back open from between his shoulder blades down to his tail bone. She would then pry the cut open until all of his ribs were exposed and one by one she would crack them. Before he could die of blood loss he would suffocate because his lungs wouldn't have anything to push off of to exhale.
She could also start a fire and let it die down until there were only the hot coals. It would take a while for him to die, and would certainly be painful. She could stand over him and watch as the light faded from his eyes.
The last thing she could think of would be to rip him apart limb by limb with her bare hands. It would be satisfying and empowering to her, and terrifying to him up until his last breath. She would save his eyes for last.
In the end she couldn't decide what to do, so she ended up making a combination of them all. First she would gouge his precious eyes out. With the dull blade she would hack off both of his feet but staunch the blood flow by burning the stumps. She then would flay his outer layer of skin off with the dull knife and rip off his arm and again staunch the blood with fire. She would then lay him face down on the hot coals and end with slicing down his back and cracking the ribs.
She grinned wickedly down at the arrogant man in front of her. She couldn't wait to contort his sneering face into a look of pure agony. Now she finally understood why Sasuke liked revenge so much. Maybe she could tell him that later; but first she had a grudge to take care of.